\documentclass{ifacconf}
\usepackage{natbib}
\begin{document}
\begin{frontmatter}
\title{Analysis of very important things\thanksref{footnoteinfo}} 
\thanks[footnoteinfo]{The author acknowledges the difficulty of publishing results}
\author[First]{Name} 
\address[First]{Return to sender (e-mail: {mr.author@tex.com} )}
\begin{abstract} 
A result that does not use the ``novel" word in its abstract.
\end{abstract}
\end{frontmatter}
\end{document}

